Fileca Sike, "Crimson Hope", who is she? Who is the person under the mask? Fileca is as mysterious as the organization to which she belongs: “Mankind Custody”. However, only a few people know their existence. Her name comes from a mythological being that keeps evil from spreading over the world, so her mission is to protect the peace and stability of the nations at all costs.
Fileca Sike and her colleague, Erithrel Areté, are high-ranking members of the "Mankind Custody". They only obey their leader. However, due to their huge rivalry, they rarely work together.